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R/C Tech Forums Thread Wiki: Official Xray XB2 2WD Buggy Thread
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Last edit by: dgrobe2112
Instruction manuals: (C/O BentKa)

Xray XB2 Carpet Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...ual_v2_low.pdf

Xray XB2 Dirt Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...w.pdf?update=2

BentKa: Carpet Edition 4 gear to 3 gear laydown conversion parts:
  • Gearbox #323014
  • Motorplate #324012
  • 36T idler gear #324236
  • Brace for waterfall #324031


Socket: Bodies Available:

Xray has two OEM bodies, the .75mm and the .50mm light weight:
light weight: https://www.amainhobbies.com/xray-xb...329701/p492942

OEM .75mm: https://www.amainhobbies.com/xray-0....329700/p477762

Also, I've fitted the yz2 body, both the light and regular fit fine, just make your own cut lines:
https://www.amainhobbies.com/yokomo-...z2-101/p417674


[i] J Concepts S2 Body [i]


Penguin Racing makes a high grip body that fits the DE and CE:
http://www.ebay.com/itm/X-Ray-Xb2-Hi...oAAOSw1S9WewHV



Socket: Wheel fitment:

According to some, you'll require different offset rear hexes to use B5M wheels. According to my Hudy setup board, B5M wheels are the same offset. I measured the overall width of the car with XB2 wheels, and then again with B5M wheels, same measurement.

On the front, B5M wheels were 1.5mm wider. Xray offers hexes to reduce width -.75 on each side, or you could spend 3-5 minutes and sand your OEM hexes down .75mm.

edit by dgrobe2112
here are the hubs for losi and AE

for AE Front 365354 -0.75
for Losi rear 365358 +3.00 (4 stripe)
for AE rear 365359 +3.75 (5 stripe)



Socket: Flex and the XB2:

Flex screws are as follows:

Plastic bulkhead between motor and waterfall. Can remove screw in chassis, or remove bulkhead altogether.

Waterfall has 4 screws, can remove the inner two or outer two. IIRC, removing the inner two provides more flex, and thus more bite.

Removing the battery brace. This gives a tremendous amount of flex on the middle of the car, and can sometimes be inconsistent. I do this for outdoor racing on low bite. I like the feel over the 4 gear in 17.5 racing, since the 4 gear will take some snap away off the corner.

Rear C block - has inner and outer screws. I haven't played with this, as it's a crucial pivot point of the car.

Medium arms and towers -> I don't believe the carpet car has the rear medium tower available, however the DE DOES have an optional hard part. I think the hard parts are more consistent, especially when it gets hot (90+ degrees F). However, the medium parts do NOT break unless you're severely talented. They also don't wear out.



Socket: Avid/Schelle Slipper mod:

Credit to WillS, Matt Trimmings, and myself for figuring this out months ago.

Parts you'll need:

B5M V2 3gear compatible top shaft.
TKO Special 5x13x5 bear OR 5x13x6 bearing Either can work. This replaces the spur side bearing on the top shaft.
5mm shims, same shims used in 1/8th scale clutch bells. Look for protek .1mm and .2mm kit.
Avid or Schelle b5m top shaft kit, with spur gears of your choosing. (DE can't handle a 69, the CE can)

Shimming: You'll need to install the bearing in the front portion of the removable piece for the shaft. Make sure the bearing is pushed all the way in. With the TKO bearing, you'll need to shim approximately 1.4mm on the front side of the top shaft. Roughly .3-.5mm with the other bearing. This is a "feel" and tolerance setting. I urge you to watch videos about setting clutch bell play in 1/8th scale to get an idea of what yield you want for end play. Too tight, it'll eat bearings.

Outside of trans case: Use Avid/Schelle top shaft spacer plus .2mm shim to offset slipper from motor plate perfectly. Install slipper as instructed, and use Avid/Schelle spring and XB2 slipper nut.

- NEW - Schelle now sells Xb2 Topshafts. They include a spacer, so no need for shims in gearbox, and comes with the smaller bearing. Both methods work.

Socket: Yokomo Differential or MIP pucks:

Credit to: WillS for figuring out pucks, and as well fitting the Losi 22 diff with the same mods.

Parts needed: Yokomo Bmax2 or YZ2 complete diff OR Mip PUCKS outdrives
Xb2 diff gear
Bmax2 V3 Worlds rear dog bones, or Bmax 2 pucks dog bones
You'll use XB2 axles, and will require no other mods for the axles or dog bones.
You'll need .2mm outdrive/diff shims. Shim approximately .5mm on each side of the diff, behind the bearings. The top portion of the transmission is what "sets" the diff in place, not the bottom half. A little play back and forth is fine, the stock diff has some play from the factory.

dgrobe2112: CE to DE conversion:
along with the parts needed.. you MUST have these following hardware, or it wont work

https://www.teamxray.com/xb2/2016/do...conversion.pdf

(3) XRAY 902340 M3x40 button head screws. these are the screws that mount the motor mount to the tranny
(4) XRAY 903322 M3x22 counter sunk screws. these are for the rear diff case, to mount to the chassis. i think i used some M3x18 and they worked ok.

Socket: Best method for setting up the XB2 ball diff:

The XB2 diff is stellar when setup correctly. The spring is too short and soft, allowing the diff to slip. You'll need to glue the rings to the outdrives with just a drop of CA, then add a 1mm shim between the spring and the outdrive. This preloads the spring and stops the diff from slipping so easily.

OR, you can run the AE diff spring, which is both slightly longer, and stiffer. The overwhelming issue is the stock spring allows the nut to bottom out on the outdrive before the diff is tight enough.

This shim:
https://www.amainhobbies.com/xray-al...a303122/p12070

This diff spring (don't need a shim, then.)

https://www.teamassociated.com/parts...thrust_spring/

Functional Aftermarket parts: (Not just bling!)

Servo Horn: (The B5M sized horns are too short to get full throw)
https://www.amainhobbies.com/protek-...800-bk/p273496


Socket: Exotek has a full suite of parts, some bling, some not. Here's a list (all fit DE and CE, unless otherwise noted):

Titanium front axles: http://www.exotekracing.com/xb2-titanium-front-axles-2/

Rear Hanger, HD (Adds 4 grams): http://www.exotekracing.com/xb2-rear...75-heavy-duty/

Brass C block, 18 grams added: http://www.exotekracing.com/xb2-rear...-brass-weight/

Alloy front camber mount: http://www.exotekracing.com/xb2-fron...er-mount-7075/

Carbon Fiber Chassis: http://www.exotekracing.com/xb2-carb...m-plate-2-5mm/

Alloy rear hubs:http://www.exotekracing.com/xb2-allo...ub-set-2-7075/

Alloy servo mounts, allow for use of LP servo:http://www.exotekracing.com/xb2-xb4-...-alloy-1-pair/

Titanium shock mounts: http://www.exotekracing.com/xb2-xb4-...shock-posts-2/

Slipper Eliminator: http://www.exotekracing.com/xb2-direct-spur-mount/
Xray eliminator is #324100

dgrobe2112: 2016-2017 new 3 gear laydown
Gearbox #323014
Motor plate #324012
36T idler gear #324236
Brace for waterfall #324031

dgrobe2112: Xray Spring Rate Conversion:
front C WHT
368174 2 str 0.65-0.85 3.71-4.85

358184 2 dot 0.65 3.71
368185 3 dot 0.72 4.11
368186 4 dot 0.80 4.57


Rear
368273 2 str 0.35-0.45 2.00-2.57

368284 1 Dot 0.35 2.00
368285 2 Dot 0.40 2.28
368286 3 Dot 0.45 2.57
368287 4 Dot 0.50 2.86

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Old 01-11-2016, 08:14 AM   #961
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Quote:
Originally Posted by dgrobe2112 View Post
i look forward to it as well. i need a little time with the car first, but your welcome to give it a few laps around if you would like. i only have the stock setup on the car since i havent had time on it yet.

see ya there.
I'd like to take you up on that, thanks!
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Old 01-11-2016, 08:32 AM   #962
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With the carpet edition being out for a month now does anyone have a decent starting setup for medium bite clay?
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Old 01-11-2016, 10:11 AM   #963
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*proof reading new XB2 Dirt Edition manual*

Looking really good I must say

Bent
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Old 01-11-2016, 10:37 AM   #964
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Hi Bent,

Sorry for off-topic, but i want to send my congratulations to Malin (and to you too), for the a-main in 4wd at DHI Cup this past weekend, well done!
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Old 01-11-2016, 10:37 AM   #965
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Quote:
Originally Posted by BentKa View Post
*proof reading new XB2 Dirt Edition manual*

Looking really good I must say

Bent
I'm excited! Already sold my B5M. Though I'll probably not get another 2WD Buggy until later this year when indoor picks up lol
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Old 01-11-2016, 11:36 AM   #966
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My car has been getting better and better. 7.5 mod xb2 on medium clay track

It's actually drivable and forgiving now. car didn't work at all out of the box but these changes made a huge difference, car responds very well to changes!

I don't know much about setup but I was able to get help from a variety of people.

So far what i've done from stock setup is:
lengthened rear links
moved rear shocks to the back
shortened wheelbase at the rear
removed several chassis flex screws
reduced rear anti squat
increased rear toe in
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Old 01-11-2016, 11:51 AM   #967
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Originally Posted by BentKa View Post
To what ride height ?

Bent
18 is as low as I can get it. I'm thinking something else must be wrong but can't see anything. Rebuilt the shocks and they are super smooth (polished the shafts), and there is no bind. Arms move freely, I dont know what else to check haha.

Rear end is 1.7x2/35wt Associated oil 27mm stroke, 3mm upstop, 1mm downstop
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Old 01-11-2016, 11:59 AM   #968
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Quote:
Originally Posted by BentKa View Post
*proof reading new XB2 Dirt Edition manual*

Looking really good I must say

Bent
Stop teasing is LOL!
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Old 01-11-2016, 12:03 PM   #969
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Quote:
Originally Posted by 3srcracing View Post
18 is as low as I can get it. I'm thinking something else must be wrong but can't see anything. Rebuilt the shocks and they are super smooth (polished the shafts), and there is no bind. Arms move freely, I dont know what else to check haha.

Rear end is 1.7x2/35wt Associated oil 27mm stroke, 3mm unstop, 1mm downstop

If you are trying to get to the 16mm front and 15mm rear ride height we are using we cut 1 row off the springs.

This applies to both 4 dot front / 3 dot rear and 3 dot front / 2 dot rear setups

Bent
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Old 01-11-2016, 12:04 PM   #970
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Quote:
Originally Posted by xrayracer1 View Post
Stop teasing is LOL!
No I won't

But seriously………..this will be awesome

Bent
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Old 01-11-2016, 02:13 PM   #971
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Can't wait to get my new XB2ce built and test it out at Thornhill Jr this weekend..hopefully its not to cold to race. Here in Tx. We are still running outdoor..
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Old 01-11-2016, 03:42 PM   #972
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Bent,

I´ve a question according to the hard and medium parts. When I use the medium parts in front, do I have more steering or less? Or does it only change the "feeling" of the car?

Furthermore do you have already a release date for the brass lipo weight?

Thanks a lot in advance!

PS: Congratulation to the great results at DHI Cup!
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Old 01-11-2016, 06:53 PM   #973
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Originally Posted by lagcisco View Post
My car has been getting better and better. 7.5 mod xb2 on medium clay track

It's actually drivable and forgiving now. car didn't work at all out of the box but these changes made a huge difference, car responds very well to changes!

I don't know much about setup but I was able to get help from a variety of people.

So far what i've done from stock setup is:
lengthened rear links
moved rear shocks to the back
shortened wheelbase at the rear
removed several chassis flex screws
reduced rear anti squat
increased rear toe in
I would add to this:

- added more rear droop( no inner spacers and unscrewed shock end)
- took away front droop (3mm internal shims)
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Old 01-11-2016, 07:28 PM   #974
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bentka, we run on medium to high bit dirt tracks. Which version would you recommend one track pure clay and pretty tacky where worn out clay compond works best, the other is clay mix with medium traction we currently run super soft slicks. I am leaning toward the dirt, thanks for input you can provide
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Old 01-11-2016, 07:54 PM   #975
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Quote:
Originally Posted by BIGTRUX View Post
Can't wait to get my new XB2ce built and test it out at Thornhill Jr this weekend..hopefully its not to cold to race. Here in Tx. We are still running outdoor..
If I get to race this weekend.. Let's see bout testing some things out. There's a couple things I wanna try..
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